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  • 1
    Electronic Resource
    Electronic Resource
    Ein neuer Beitrag zur Phosphazoreaktion (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 399 (1973), S. 225-230 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Contribution to the Phosphazo ReactionThe reaction of acrylonitrile with phosphorus pentachloride gives ClCH2CCl2CCl2NPCl3 (I) and a hexachlorophosphate with the composition C3H2Cl14NP3 (II). For the first time the structure of (II) has been exactly determined by using 1H- and 31P-NMR-spectra. The course of reaction was studied in detail. 3-chloropropionitrile has been found as the product of a secondary reaction. The reaction of butyramide with PCl5 has also been investigated, and was found to be analogous.
    Notes: Bei der Umsetzung von Acrylnitril mit PCl5 entsteht neben ClCH2CCl2CCl2NPCl3 (I) auch das Hexachlorophosphat mit der Zusammensetzung C3H2Cl14NP3 (II). Die Struktur von (II) konnte durch 1H- und 31P-NMR-Untersuchungen erstmals eindeutig bestimmt werden. Der gesamte Reaktionsablauf wurde untersucht. Infolge einer Sekundärreaktion entsteht u. a. 3-Chlorpropionitril. Die Umsetzung von Butyramid mit PCl5 wird ebenfalls beschrieben. Sie zeigt einen analogen Verlauf.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733990213
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  • 2
    Electronic Resource
    Electronic Resource
    Untersuchungen über Phosphazoverbindungen aus Anilinen mit PhosphorpentachloridFrau Professor Margot Becke-Goehring zum 60. Geburtstage gewidmet (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 406 (1974), S. 214-220 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on Phosphazo Compounds from Anilines with Phosphorus PentachlorideThe reaction of anilines with PCl5 gives the monomer compound ArNPCl3. This will dimerize in many cases to (ArNPCl3)2. There are no indications for the former postulated intermediate product ArNHPCl4. We can correlate the tendency to dimerize with the basicity of the anilines. This is confirmed by the measurements of the constants of basicity in acetonitrile.
    Notes: Bei der Reaktion von Anilinen mit PCl5 entsteht die monomere Verbindung ArNPCl3. Diese dimerisiert in vielen Fällen zu (ArNPCl3)2. Für die früher postulierte Zwischenstufe ArNHPCl4 gibt es keine Hinweise. Die Neigung zur Dimerisation ist mit der Basizität der Aniline korrelierbar. Dies wird durch die Messung der Basenkonstanten in Acetonitril bestätigt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19744060213
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  • 3
    Electronic Resource
    Electronic Resource
    Strukturchemie titan-organischer Verbindungen: Die Struktur von [(π-C5H5)2 Ti(NO3)]2O (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 479 (1981), S. 113-118 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structural Chemistry of Organotitanium Compounds: Structure of [(π-C5H5)2Ti(NO3)]2OCareful hydrolysis of (π-C5H5)2Ti(NO3)2 in tetrahydrofuran yields crystals of [(π-C5H5)2Ti(NO3)]2O (A). Crystal data of A: monoclinic, space group P21/c; lattice constants: a = 12.656(4), b = 10.181(5), c = 16.197(3) Å, ß = 93.57(3)º, Z = 4. As an X-ray analysis shows, the NO3 groups act as monodentate ligands with Ti—O distances of 2.085 and 2.059 Å. The ligands are arranged in a nearly tetrahedral way around the Ti atoms. The bond angle at the bridging O atom is 171.8º.
    Notes: Bei der vorsichtigen Hydrolyse von (π-C5H5)2Ti(NO3)2 in Tetrahydrofuran entsteht der Zweikernkomplex [(π-C5H5)2Ti(NO3)]2O (A) Kristalldaten von A: monoklin, Raumgruppe P21/c; Gitterkonstanten: a = 12,656(4), b = 10,181(5), c = 16,197(3) Å, ß = 93,57(3)º und Z = 4. Eine Röntgenstrukturanalyse ergibt, daß die Nitratgruppen als einzähnige Liganden mit Ti—O-Abständen von 2,085 und 2,059 Å fungieren. Die Ti-Atome weisen eine annähernd tetraedrische Koordination auf. Der Winkel am Brücken-O-Atom beträgt 171,8º.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814790813
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  • 4
    Electronic Resource
    Electronic Resource
    Über die Umsetzung von Adipinsäurediamid mit Phosphorpentachlorid (1973)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 396 (1973), S. 261-266 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Adipic Acid Diamide with Phosphorus PentachlorideThe reaction of adipamide (I) with phosphorus pentachloride in a solvent leads to (Cl3P=NCCl2CCl2CH2)2 (II). The stages of the reaction are: 1. chlorination of the keto and methylen groups 2. formation of the —N=PCl3 group.This result is a supplement of the existing conception about the course of the reaction of carboxylic acid amides with phosphorus pentachloride.The reaction of (I) with PCl5 without any solvent has been reproduced and the course of reaction has also been investigated. This reaction gives mainly NC(CH2)4CN.The resulting product of a careful hydrolysis of (II) is (Cl2OPN=CClCl2CH2)2. A total hydrolysis gives back (I).
    Notes: Bei der Umsetzung von Adipinsäurediamid (I) mit Phosphorpentachlorid in einem Verdünnungsmittel bildet sich (Cl3P=NCCl2CCl2CH2)2 (II). Der Reaktionsablauf ist: 1. Chlorierung der Keto- und Methylengruppen und 2. Bildung der —N=PCl3-Gruppierung. Dieses Ergebnis ist eine Ergänzung der bisherigen Vorstellungen über den Reaktionsablauf bei der Umsetzung von Säureamiden mit Phosphorpentachlorid.Die Reaktion von (I) mit PCl5 ohne Lösungsmittel wurde nachgearbeitet und ebenfalls in ihrem Ablauf untersucht. Hierbei entsteht vornehmlich NC(CH2)4CN.Bei vorsichtiger Hydrolyse von (II) erhält man (Cl2OPN=CClCCl2CH2)2. Totalhydrolyse führt zur Rückbildung von (I).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19733960303
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  • 5
    Electronic Resource
    Electronic Resource
    Ein Titan(IV)-Komplex mit zwei koordinativ gebundenen Wassermolekülen: [(π-C5H5)2 Ti(H2O)2](NO3)2 (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 476 (1981), S. 62-68 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Titanium (IV) Complex with Two Coordinatively Bonded Water Molecules: [(π-C5H5)2Ti(H2O)2](NO3)2(π-C5H5)2Ti(NO3)2 and H2O react in acetone to form the diaquo complex [(π-C5H5)2-Ti(H2O)2](NO3)2 (A). An X-ray analysis shows the titanium atom to be nearly tetrahedrally coordinated. Mean values of distances: Ti—O 2.01 Å, Ti—Z 2.03 Å (Z = center of ring); angles: O—Ti—O 92.7°, Z—Ti—Z 133.6°. Anions and cations are joined by hydrogen bonds to form strands that run in the direction of the crystallographic a axis. A crystallizes in the orthorhombic space group Pnma with Z = 4 and lattice parameters at - 100°C a = 7.601(2), b = 13.458(4) and c = 13.139(4) Å.
    Notes: (π-C5H5)2Ti(NO3)2 reagiert mit Wasser in Aceton unter Bildung des Diaquokomplexes [(π-C5H5)2Ti(H2O)2](NO3)2 (A). Eine Röntgenstrukturanalyse ergibt, daß das Ti-Atom eine annähernd tetraedrische Koordination besitzt. Mittelwerte der Abstände: Ti—O 2,01 Å, Ti—Z 2,03 Å (Z = Ringzentrum); Winkel: O—Ti—O 92, 7°, Z—Ti—Z 133,6°. Die Anionen und Kationen sind entlang der kristallographischen a-Achse durch Wasserstoffbrücken zu Strängen verknüpft. A kristallisiert in der orthorhombischen Raumgruppe Pnma mit Z = 4 und den Gitterkonstanten bei — 100°C a = 7,601(2), b = 13,458(4) und c = 13,139(4) Å.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814760508
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  • 6
    Electronic Resource
    Electronic Resource
    Das Verhalten der Elemente der III. Gruppe zueinander und zu den Elementen der IV. Gruppe (1948)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 256 (1948), S. 239-252 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1Es werden die Zustandsdiagramme von: Aluminium/Indium, Gallium-Thallium, Gallium/Silicium, Gallium/Germanium, Indium/Silicium, Indium/Germanium, Thallium/Germanium bestimmt.2Die von Valentiner und Mitarbeitern bearbeiteten Zustandsdiagramme des Indiums mit Thallium, Zinn und Blei werden, zum Teil auf Grund neuer Versuche, erörtert.3Es wird das Verhalten der Elemente der III. Gruppe zueinander wie zu den Elementen der IV. Gruppe besprochen. Es ergibt sich, daß die Elemente der III. Gruppe sowohl in der Tendenz zur Verbindungsbildung als auch in der Neigung zur Mischbarkeit ein Minimum aller Gruppen darstellen.4Es wird eine einfache Heizkamera beschrieben.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19482560404
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  • 7
    Electronic Resource
    Electronic Resource
    Abbau einiger Harnsäureglykol-äther durch Lauge (1925)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 58 (1925), S. 2740-2747 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19250581207
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  • 8
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    Biological experiments - The Viking Mars Lander. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: From the biological point of view, the Viking 1975 mission might be regarded as a test of the Oparin-Haldane hypothesis concerning the chemical evolution of living systems. Mars is a planet whose early history was probably similar to that of the earth and whose present environmental conditions may be compatible with the maintenance of living organisms. Thus, the biological experiments aboard the Viking I spacecraft are primarily concerned with the question of whether chemical evolution on Mars took place, and, if so, whether the process reached a level of complexity characteristic of replicating systems.
    Keywords: BIOTECHNOLOGY
    Type: Icarus; 16; Feb. 197
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    NASA TECHNICAL REPORTS
  • 9
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    The utility of automated systems in the search for extraterrestrial life. (1965)
    In:  Other Sources
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    Publication Date: 2018-12-01
    Description: Extraterrestrial life detection on Mars using unmanned spacecraft equipped for automatic physical and chemical tests
    Keywords: BIOTECHNOLOGY
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    NASA TECHNICAL REPORTS
  • 10
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    Biological instrumentation for the Viking 1975 mission to Mars. (1972)
    In:  Other Sources
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    Publication Date: 2019-07-27
    Description: A brief introduction is given on why Mars is of interest from a biological point of view, along with an overview of the Viking 1975 mission. Details are given about the four biology instruments aboard the spacecraft and the experiments for which they are to be used. These are: the carbon assimilation experiment to determine whether the soil is biologically active; the label release experiment to detect metabolic activity by the release of radioactive CO2 from C-14 labelled simple organic substrates; the gas exchange experiment to detect biological activity by repeated gas chromatography analysis of soil samples; and the light scattering experiment, where increase of scattering and decrease of light transmission would indicate the growth of organisms. Examples are given of data obtained with terrestrial soils in these experiments.
    Keywords: BIOTECHNOLOGY
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    NASA TECHNICAL REPORTS
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